P. Lunney¹, V. Kariyawasam², K. Middleton¹, R. Wang¹, T. Huang³, C. Selinger², J. Andrews⁴, R. Leong², ¹The University of Sydney, Sydney Medical School, Sydney, Australia, ²Concord Repatriation General Hospital, Gastroenterology and Liver Services, Sydney, Australia, ³University of New South Wales, Australia, ⁴Royal Adelaide Hospital, Adelaide, Australia

I. Cleynen*¹, W. Van Moerkercke², T. Billiet¹, N. Vande Casteele³, M. Ferrante², M. Noman², G. Van Assche², P. Rutgeerts², S. Segaert⁴, A. Gils³, S. Vermeire²

¹KU Leuven, Clinical and experimental medicine, Leuven, Belgium, ²UZ Leuven, Gastroenterology, Leuven, Belgium, ³KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Therapeutic and Diagnostic Antibodies, Leuven, Belgium, ⁴UZ Leuven, Department of Dermatology, Leuven, Belgium

B.P.M. Verhaegh^1,2, D.M.A.E. Jonkers^1,2, A. Driessen³, M.P. Zeegers^2,4,5, A.A.M. Masclee^1,2, M.J. Pierik¹, ¹Maastricht University Medical Center+, Internal Medicine – Division Gastroenterology-Hepatology, Maastricht, Netherlands, ²Maastricht University Medical Center+, NUTRIM, School for Nutrition, Toxicology and Metabolism, Maastricht, Netherlands, ³Antwerp University Hospital, Pathology, Edegem, Belgium, ⁴Maastricht University Medical Center+, Complex Genetics, Cluster of Genetics and Cell Biology, Maastricht, Netherlands, ⁵University of Birmingham, Public Health, Epidemiology and Biostatistics, Birmingham, United Kingdom

M. Di Girolamo¹, A. Scarcelli¹, A. Bertani¹, A. Sartini¹, A. Merighi¹, E. Villa¹, ¹Policlinico Modena, Italy

B. Christensen*, S.R. Goeppinger, R. Colman, D. Siddiqui, A. Yarur, A.A. Bochenek, A. Wichmann, A. Hirsch, J. Kinnucan, A. Sakuraba, R. Cohen, D.T. Rubin

University of Chicago Inflammatory Bowel Disease Center, Gastroenterology, Chicago, IL, United States

A. Lainé¹, A. Laurent¹, A. Mariage¹, B. Flourié², S. Nancey³, ¹University of Franche Comte, Psychology, Besançon, France, ²Hôpital Lyon Sud, service Gastro Entérologie, Lyon, France, ³Hôpital Lyon Sud, service Gastro Enterologie, Lyon, France

A. Vollebregt¹, L. Bel¹, A. van der Meulen¹, H. Fidder², R. Ten Hove³, C. Vliet-Vlieland^4,5, M. ter Kuile⁴, E. de Groot⁴, S. Both⁴, ¹Leiden University Medical Center, Gastroenterology, Leiden, The Netherlands, ²University Medical Centre Utrecht, Gastroenterology, Utrecht, The Netherlands, ³Diaconessen­huis Leiden, Gastroenterology, Leiden, The Netherlands, ⁴Leiden University Medical Center, Outpatient Clinic for Psychosomatic Gynaecology and Sexology, Leiden, Netherlands, ⁵General Practitioner Practice 't Wantveld, Noordwijk, The Netherlands

A. Testa*¹, A. Rispo¹, M. Rea¹, G.D. De Palma², M. Diaferia¹, D. Musto¹, F. Sasso¹, N. Caporaso¹, F. Castiglione¹

¹AOU Policlinico Federico II of Naples, Gastroenterology, Naples, Italy, ²AOU Policlinico Federico II of Naples, Surgery and Advanced Technologies, Naples, Italy

F. Furfaro¹, R. Sciurti¹, C. Bezzio¹, A. Dell'Era², S. Ardizzone¹, R. de Franchis², G. Maconi¹, ¹Luigi Sacco University Hospital, Gastroenterology and IBD Unit, Milan, Italy, ²Luigi Sacco University Hospital, Gastroenterology Department, Milano, Italy

L. Hicks¹, D. Walker¹, D. Eng², B. Jiminez², J. Kinross², E. Holmes², H. Williams¹, T. Orchard¹, ¹Imperial College London, Gastroenterology, London, United Kingdom, ²Imperial College London, Surgery and Cancer, London, United Kingdom

M. Boyle*¹, S. Murphy², J. Leyden², P. MacMathuna², G. Doherty¹, G. Cullen¹

¹St Vincents University Hospital, Gastroenterology, Dublin, Ireland, ²Mater Misercordiae University Hospital, Gastroenterology, Dublin , Ireland

L. Trikos¹, D. Bojic², V. Gligorijevic², S. Markovic², N. Jojic², ¹University Clinical Centre “Zvezdara”, Center of psychiatry, Belgrade, Serbia, ²University Clinical Centre “Zvezdara”, Department of Gastroenterology and Hepatology, Belgrade, Serbia

C. Vaizey¹, P.R. Gibson², C.M. Black³, R.J. Nicholls⁴, A.R. Weston⁴, D.R. Gaya⁵, S. Sebastian⁶, I. Shaw⁷, S. Lewis⁸, S. Bloom⁹, J.N. Gordon¹⁰, A. Beale¹¹, I. Arnott¹², S. Cambell¹³, T. Fan³, ¹St Mark's Hospital, Department of Surgery, London, United Kingdom, ²Monash University, Victoria, Australia, ³Merck & Co. Inc., Global Health Outcomes, Whitehouse Station, United States, ⁴OptumInsight, Sydney, Australia, ⁵Glasgow Royal Infirmary, Gastroenterology Unit, Glasgow, United Kingdom, ⁶Hull Royal Infirmary, Department of Gastroenterology, Hull, United Kingdom, ⁷Gloucester Royal Hospital, Department of Gastroenterology, Gloucester, United Kingdom, ⁸Derriford Hospital, Department of Gastroenterology, Plymouth, United Kingdom, ⁹University College London Hospital, Department of Gastroenterology, London, United Kingdom, ¹⁰Royal Hampshire Hospital, Department of Gastroenterology, Winchester, United Kingdom, ¹¹Bristol Royal Infirmary, Bristol, United Kingdom, ¹²Western General Hospital, Edinburgh, United Kingdom, ¹³Manchester Royal Infirmary, Manchester, United Kingdom

C. Taxonera*^{1, 2}, E. Iglesias³, F. Muñoz⁴, M. Calvo⁵, M. Barreiro-de Acosta⁶, D. Busquets⁷, X. Calvet⁸, A. Rodríguez⁹, R. Pajares¹⁰, J.P. Gisbert^{11, 12}, J.L. Pérez-Calle¹³, P. López-Serrano¹³, A. Ponferrada¹⁴, C. de la Coba¹⁵, F. Bermejo¹⁶, M. Chaparro^{11, 12}, J.L. Mendoza^{1, 2}, D. Olivares^{1, 2}, I. Fernández-Blanco¹⁷

¹Hospital Clínico San Carlos, IBD Unit, Madrid, Spain, ²Hospital Clínico San Carlos, IdISSC, Madrid, Spain, ³Hospital Reina Sofía, Gastroenterology, Córdoba, Spain, ⁴Hospital de León, Gastroenterology, León, Spain, ⁵Hospital Puerta de Hierro, Gastroenterology Unit, Madrid, Spain, ⁶Hospital Clínico de Santiago, Gastroenterology, Santiago de Compostela, Spain, ⁷Hospital Josep Trueta, Gastroenterology, Girona, Spain, ⁸Corporació Sanitària Parc Taulí, Servei d'Aparell Digestiu, Sabadell, Spain, ⁹Hospital Universitario de Salamanca, Gastroenterology, Salamanca, Spain, ¹⁰Hospital Infanta Sofía, Gastroenterology, San Sebastián de los Reyes. Madrid, Spain, ¹¹Hospital La Princesa, Gastroenterology Unit, Madrid, Spain, ¹²Hospital La Princesa , IP and CIBERehd, Gastroenterology, Madrid, Spain, ¹³Hospital de Alcorcón, Gastroenterology Unit, Madrid, Spain, ¹⁴Hospital Infanta Leonor, Gastroenterology, Madrid, Spain, ¹⁵Hospital de Cabueñes, Digestive Department, Gijon, Spain, ¹⁶Hospital de Fuenlabrada, Gastroenterology Unit, Madrid, Spain, ¹⁷Hospital Moncloa, Gastrointestinal Surgery, Madrid, Spain

M. Barreiro-de Acosta, R. Ferreiro, M. Iglesias, A. Lorenzo, J.E. Dominguez-Muñoz, University Hospital Santiago de Compostela, Gastroenterology, Santiago, Spain

P. Zita¹, T. Koller¹, J. Toth¹, M. Huorka¹, Z. Zelinkova¹, S. Oravcova¹, T. Hlavaty¹, ¹University hospital Bratislava, Department of Gastroenterology and Hepatology, Bratislava, Slovakia

C. Parker*¹, J. Waugh², M. Gunn¹

¹Royal Victoria Infirmary, Gastroenterology, Newcastle upon Tyne, United Kingdom, ²Royal Victoria Infirmary, Obstetrics, Newcastle upon Tyne, United Kingdom

L. Gheorghe¹, R. Iacob¹, S. Iacob¹, R. Vadan¹, L. Guinea¹, M. Greere¹, B. Cotruta¹, D. Dobru², C. Mihai³, G. Stefanescu³, R. Zaharie⁴, M. Ilie⁵, M. Jinga⁶, M. Diculescu¹, C. Gheorghe¹, on behalf of the IBDPROSPECT Study Group, ¹Fundeni Clinical Institute, Digestive Diseases and Liver Transplantation Center, Bucharest, Romania, ²Municipal Hospital Targu Mures, Gastroenterology, Targu Mures, Romania, ³Gastroenterology and Hepatology Institute Iasi, Gastroenterology, Iasi, Romania, ⁴3rd Medical Clinic Cluj-Napoca, Gastroenterology, Cluj-Napoca, Romania, ⁵Floreasca Emergency Hospital, Gastroenterology, Bucharest, Romania, ⁶Central Military Hospital, Gastroenterology, Bucharest, Romania

M. Dranga¹, C. Mihai¹, E. Toader¹, G. Dumitrescu¹, I. Pintilie¹, A.M. Blaj², C. Cijevschi Prelipcean¹, ¹University of Medicine and Pharmacy Gr. T. Popa, Institute of Gastroenterology and Hepatology, Iasi, Romania, ²Institute of Gastroenterology and Hepatology, Iasi, Romania

M. Ghio¹, G. Bodini*¹, P. Contini¹, V. Savarino¹, E. Savarino^{1, 2}

¹IRCCS San Martino Genova, Dipartimento di medicina interna, Genova, Italy, ²University of Padua, Department of Surgery, Oncology and Gastroenterology, padova, Italy